The site of calcium regulation in the smooth muscle cell is ________.
A) actin
B) troponin
C) myosin
D) calmodulin
Answer: D
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Muscles and Muscle Tissue
- An individual has just ingested a chemical that binds irreversibly to the ACh receptors in the sarcolemma. By itself it does not alter membrane potential, yet prevents normal neurotransmitter binding. Ignoring the effects on any other system, the consequence to skeletal muscle would be ________.
- Hypothetically, if a muscle were stretched to the point where thick and thin filaments no longer overlapped ________.
- Of the following muscle types, which has only one nucleus, no sarcomeres, and rare gap junctions?
- Three discrete types of muscle fibers are identified on the basis of their size, speed, and endurance. Which of the following athletic endeavors best represents the use of red fibers?
- The most distinguishing characteristic of muscle tissue is ________.
- Which of the following is most accurate?
- After nervous stimulation stops, ACh in the synaptic cleft is prevented from continuing stimulation of contraction by ________.
- The sliding filament model of contraction involves ________.
- Muscle tone is ________.
- An anaerobic metabolic pathway that results in the production of two net ATPs per glucose plus two pyruvic acid molecules is ________.
- Which of the following statements is true?
- The giant protein titin maintains the organization of the ________ assisting in muscle stretching.
- Muscle tissue has all of the following properties except ________.
- Smooth muscle is characterized by all of the following except ________.
- Which of the following is true about smooth muscle contraction?
- Which of the following statements is not true concerning developmental aspects of muscle?
- The cells of single-unit visceral muscle ________.
- The mechanism of contraction in smooth muscle is different from skeletal muscle in that ________.
- Smooth muscle is significantly different from striated muscle in several ways. Which of the following is true?
- The muscle cell membrane is called the ________.
- In an isotonic contraction, the muscle ________.
- When a muscle is unable to respond to stimuli temporarily, it is in which of the following periods?
- During vigorous exercise, there may be insufficient oxygen available to completely break down pyruvic acid for energy. As a result, the pyruvic acid is converted to ________.
- The main effect of the warm-up period of athletes, as the muscle contractions increase in strength, is to ________.
- The warm-up period required of athletes in order to bring their muscles to peak performance is called ________.